Improvement in attaching- collars for stove-pipes



F. H. MERRILL Stove Pipe.

Patented June 1, 1869.

N. PETERS. Pnobunwgnpher. washington. D.C.

@wat @time FRANK MERRILL, OF CAPE ELIZABETH, MAINE.

Letters Patent N 90,862, dated June 1,1869.

vI1\H?RO`V'EIMENT IN-ATTAQHING- COLLARS FOR STOVEPIPES.

The Schedule referred to in these Letters Patent and making part cf thesame.

the following, taken in connection with the drawings which accompany andform part of this specification, is a description of my invention,sufficient to enable those skilled in the art to practise it.

In running a horizontal elbow from a vertical pipe connected with astove, or from the vertical sheet-iron .casing of a stove, it iscustomary to use a flanged castlnetal ring or collar, which tits overthe pipe, or which itself makes the elbow, while the flange tits againstthe surface ofthe pipe or stove, said flange being riveted, bolted, orscrewed to the stove-pipe.

The labor attending the fastening of the collar in place, and theemployment of the rivets, screws, or bolts, have led me to devise ameans of connection, whereby such fastenings are entirely dispensed withand My. invention consists in a collar, having inner and outer flangedrings, connected together, without the employment of fasteningsextending through the flanges, the connector being preferably aclamp-ring, the flange of the inner collar-ring fitting upon the innersurface of the pipe, and the ange of the outer ring, upon the outersurface thereof, so that by clamping the two rings together, the collaris attached to the pipe, or to a stove,vwthout rivetsor similarfastenings, and without necessity of cutting through the pipe or stove,for connection of the elbow thereto, any other hole than the due-hole,to lead into the elbow.

lhe drawings represent a collar embodying inyinvention.

A shows the collar in elevation, applied to a storepipe.

vB is a section, on the line a; a'. y

a denotes the stove-pipe, which may be circular, oval, or of any otherform, in section.V

b, the cast-metal collar, by which the pipe is to be fastened to anelbow, for connecting the pipe with a stove, or with another pipe.

'lhis collar is shown as composed of three parts, namely, an inner ring,c, au outer ring, (l, and a connecting-ring, c. j

The cylindrical part of the ring c its into and projects through thehole cut through the pipe, where the connection is to be made, and thering has a flan ge, f, projecting cut-ward from it, this `flange beingformed in casting, to lit the inner surface ofthe pipe, as seen at B.

Around the ring c, the outer ring c is placed, this ring also having anoutwardlyprojecting flange, g, which lits upon the outer surface of thepipe, as seen at B, the pipe adjacent to the edge of the hole beingembraced between the two tlauges fg.

The outer ring Z extends outwardly some distance beyond the end of thering c, and has cast upon its inner surface, two or more lips, orprojections, h., which extend in over the edge/of the ring c, as seen inthe drawings.

The ring c has an -inwardly-projecting lip, t', extending partiallyaround it, and under this lip, an outwardly-projecting flange, It', onthe ring c, ext-ends, the ring c being passed into the ring (l fromwithin.

The ringr c also has lips or projections l, extending from its outersurface.

In connecting the collar to the pipe, or to a stove plate, the ring d,placed on .the outer side of the pipe or plate, around the ilue-hole andthe ring c, is thrust through the hole into the ring d.

lhe rings being then tempo arily held in position, the clamp-ring c ispassed into the inner ring from the inside of the pipe, its projectionsl being slippedv through slots in, cut in the tlange or lip i, of thecollar-ring c, bringing the lips or flanges vi hinto contact.

The clamp-ring c is then turned until Aits lips or projections l slideover the lips or projections h ofthe outer ring or collar L Theprojections l and It are both inclined on their abutting surfaces, andas the lips l ride over the lips h, the rings c l are clamped together,and to the pipe or stove-plate, the clamp heilig tightened by turningthe ring c, and forcing thofprojections I over the projections h, aswill be readily understood.

In thus connecting the parts, and in disconnecting them, a lever, pn,may be used, said lever being bent so as to take hold of two projectionso, extending from the ring c. l

1t will readily be seen that collars thus made can be very readily andrapidly applied or disconnected without the aid of a skilled workman,and without the v employment, in any way, ofholts, rivets, or screws.

The construction of the parts maybe materially modified withoutdeparture from the essential features of my invention, and iii-applyingthe collar to a llat plate, the ring f may be dispensed with, lips uponthe inner ring slipping directly over lips upon the outer ring, byturning either with respect to the other.

I clainrthe combination of the inner and outer flanged rings, clampedtogether, without the employment of rivets, or equivalentfastening-devices, substantially as described.

FRANK H. MERRILL.

Witnesses:

FRANCIS GoULD, S. B. KIDDnR.

